3.49K J.K. Trotter 12/11/13 11:47AM Filed to: manhattan transfers manhattan transfers new york city bill de blasio gracie mansion politics The family of mayor-elect Bill de Blasio is moving into Gracie Mansion for “logistical and security concerns.” The de Blasios promise to visit Park Slope, Brooklyn, where they occupy a “modest three-story townhouse,” as often as they can.